Street-car truck



T. A. BREWSTEH.

STREET CAR TRUCK. lAPPLICATIOFI FILED SEFT.2. w19|9.

Patented July (i, M20,

5 SHEETS-SHEEI` l.

T. A. BREWSTER.

STREET CAR TRUCK.

APPLICATION FILED SEPT. 2, 1919.

T. A. BREWSTER. STREET CAR TRUCK. APPLICATION FTLED SEPT. 2, |919.

Patented. .Tuly 6 192 Mmmm@ July A55, wma;

5 SHEETS--SHEET 4.

T. A. BHEWSTER.

STREET CAR TRUCK. APPLICATION FILED SEPT. 2, 1919.

Patented. .Tuly 69 T920.

5 SHEETS-SHEET 5.

fil() THEDORE A. BREWSTER, OFST. LOUI, MISSURI.

ernaar-can rauen.

indd-5,59%.,

Specification of Letters Patenti applic-anda mea september a, ieia serial no. aaron.

To all whom z'z may concern:

Be it known that l, 'linioooiui d. BREW- STER, a citizen of the United States, residing. in the city of St. Louis andtate of Mis4 souri, have invented certain new and useful llmpi'ovements in Street-Car iTrucks, of which the following is a sptivcification.

'lliis invention relates to street car trucks, and more particularly to the type of truck used under short length cars, generally known as the single truck type and is a distinct and practical improvement to overcome certain important practical objections to, and defects in, trucks of the above type.

It is a well known fact, that when a single truck car of the present typeis being propelled around a curve, a serious stress is set up into the springs due to the `car body attempting to continue along in a straight line, and as a result of this tendency the car bodyactually does continue.` along in this straight line until the truck yislfpart way along the curve. ln the meantime "the,A stress is lincreasing until the car body finally yields and then it moves swiftly toward the c ntei line of the curved track, but the force now is so great that the body continues too/ far and a stress is again set up in the opposite direction thus a swaying motion is set up which is very annoying to passengers, and has resulted in injury to the passengers and broken springs. t

lt is an object of my presentvinvention to provide a street car truck which will eliminate the above and other objections which are a ysource of annoyance in most of the trucks now in service under the small type of cars, 'generally known as the single truck type. l

il further object of my invention is to provide a truck with telescopic driving means which also serve as auxiliary spring housings and overcomes the objections previously mentioned by holding the center line of a car body, at all times, directly over the center line of the truck, and, at the same time, permitting the quarter elliptic springs, ll employ, to function, as intended, in an u and down movement. A

.d stil further object oxjjthe invention is to HX the driving means toftlie truck frame, preferably .the journal bones thereof, to

, establish ai positive four 'specification and finally point drive remote from the springs employed. i

v With thle above and other objects in view, thel invention consists in certain novel features -of construction, arrangement and coinbination of parts, described in the following pointed out in the claims hereto appended.

Referring to the accompanying drawings forming a part of this specification wherein like characters of reference denote similar parts throughout the several views:

Figure l, is a top plan view of `my improved truck and part of a car frame mounted thereon.

Fig. 2, is a side elevation of a truck positioned under a car, the car being shown as partly broken awa Fig. 3, is a detailin side elevation of one end .of the truck and car under-frame.

' Fig. t, is a detail in sectional elevation of one endof my improved truck. Fig. 5, is a-detail in sectional elevation illustrating the positive driving means between the truck and car under-frame.

Referring to the drawings, l indicates a car body having a floor '2. The floor is mounted upon a pi Lrality of suitably spaced cross-sills The iirosssills are each provided willi a wood iiller 4l. to which the flooring is secured. 5 represents tlie car body side sill, as clearly shown in Fig. 4.

rlhe truck comprises a pair of suitable side sills 6, such as ll-beams, connected by suitable fasteners 7 at each end to the suitably spaced arms 8 lformed integral with each journal-box. 9 and a pair of suitable `hanneled end sills 10 which are connected y suitable fasteners ll to the channeled arms 1 2 formed integral lwith each journalboX 9. The journal-box 9 is provided with the usual door 13. rlFhe journalJbc-:r 9 is further provided with a removable .ittom section 1d which is held in position by suitable fasteniiig means l5.

16 indicates a journal wedge.

17 repre- ]Patented duly n, l92d..l

sents a bearing while 18 designates the axle,

and 19 a wheel;

lltltl 2 0 indicates Va suitable quarter elliptic spring arm which is mounted both upon the 'joiirn'aLboXlland the side sills 6 of the truck frame.- "llhd spritzig 20 is provided with a nal-boxes thereof, it will be observed that suitable spring-band 21 above leach journalboxY 9. The spring is held in position at e one end by means of a suitable clip 22.

.1'.23 indicates -a suitable lower driving arm 1 member, preferably tubular, which is pro- Ivided with a suitable integral base 24. The

driving arm'base 24 ispreferably, although not necessarily, secured to the journal-box arms 8 and 12 by means of suitable fasteners 25. -The base 24 4preferably straddles each spring arm 20 to assist in holding the spring arm in position.

vA suitable upper driving arm member 26, preferably tubular, is arranged for telescopic connection with -the upper end of -each lower driving arm member 23. A suitable coiled'spring 27 is interposed between the upper driving arm member 26 andthe lowerdriving arm member 23, as clearly shown in Fig. 5. The upper driving arm member 26 is provided with an integral arm 28 which is connected by means of suitable fasteners 29 to -axfsuita'ble sub-sill 30. The

.sub-sill 30 isfipxed'fbetween the cross-sills 3 Qf,the under-franieby means of'angle-plates i p and suitable. fasteners 32. A suitable gusset plate 33 is 'x'e'd'to the body side-sills 3 and the sub-sills 30.

It will -be here observed that the lower i driving arm members 23, including the bases y 24, upper driving arm members 26 and subtheir ends by means of angle plates 40 and fasteners 41 to the cross-sills 3 and 42, The s`ubsills39 are adapted to rest or seat upon the base 36 of the pivotally supported hangers suspended from the free end of each quarter elliptic sprinlg 20,'as clearly show n Figs. '1,' 2.and 3. ach hanger base 36 1s preferably fixed to its respective sub-sill 39 by any suitable fastening means.1

It will be observed lthat the free' ends of the quarter elliptic spring arms 20 are guided in such a manner that slde sway 1s impossible, and at the same time the `springs are permitted to move up and down freely, as is manifest. y

Each "lower driving ar'm member, belng xedto .the truck frame, preferably the jourthey establish apositive drive connection between the truck frame and car under-frame that will positively eliminate rocking movements either side or end wise, as 1s manifest.

The driving units, it -will be further observed, are preferably so formed and arranged that they will readily adapt themserves for use as auxiliary or buffer spring housings. v

It will be observed that the journal-boxes 4are of unique design and made to combine both strength and neatness of lines and to provide suitable supports for both the side -brackets and guides for center brake levers.

From the foregoing description, it is evident that I have constructed a truck for cars of the single truck type, which will positively hold the centei1 line of a car body at all times with the center line of the truck due to the fixed four point driving means established between the truck frame and the under-frame of the car, and at the same time permit the quarter elliptic springs 20 to function as intended -in an up and down movement, whether rounding curves, or rolling on a straight track.

A truck as herein described is safe, eiiicient, simple in its construction and will carry passengers with a much greater degree of. comfort than trucks of the type now m service.

The many other advantages of a truck as herein described will readily suggest themselves tothose skilled in the art to which it appertains.

I do not wish to be understood as having limited 'myself to the exact details of construction shown and described, but desire to have it understood that the device I have shown in the drawings is merely illustrative, as it is manifest that various minor changes may be made in the form, shape and particular arrangement of parts without departing from the spirit of my invention, hence reserve thevright to make any such changes or modifications as may fairly fall within the scope of the appended claims when fairly construed.

lVhat I claim isi 1. In combination with theunderframe of a car, a truck, a telescopic four point drive connection between the truck frame and the underframe, and a buffer spring carried by each drive connection.

2. A street car truck comprising a plurality of journal-boxes, side and end truck sills,

means integral with journal-boxes for conmeeneem m meeting the side and enel sills therete, a carried by thefree end of each sprng'for e quarter elliptic eprlng supported by each peri; of the' underfmme of the car to rest journal-box and the side sills, a telescopic upon.

driving arm supported by each j ournal-box, In testimony whereofT, ll have hereunto ll'es1l1ent means ea'rled wltlnn each drlvlng slgneellmy name to the speelealuon. erm, means for cenneetlng the drlvlng arms with the nnclerrame 01E a eer, and means 'lFHlEUDORE A. BREWSTER. 

